The top three officials in Ukraine’s Interior Ministry have been killed, when their helicopter crashed near a kindergarten in a suburb outside Kyiv. At least 17 people died, including Ukraine’s interior minister, his first deputy minister and the state secretary. Three of the dead were children on the ground. The injured also included 17 children. At the time of the crash, the Ukrainian officials were heading to the frontlines in eastern Ukraine. It is not clear what caused the helicopter crash. There was heavy fog at the time. Ukraine’s Interior Minister Denys Monastyrsky is Ukraine’s highest-profile casualty since Russia invaded 11 months ago.